1564
Sea Level
(imgs.xkcd.com)
Alt text: They're up there with coral islands, lightning, and caterpillars turning into butterflies.
In China, it's 8 due to the number sounding like the Mandarin word for death
In my understanding, 4 sounds like the word for death and 8 sounds like the word for wealth, so 8 is considered lucky.
But I don’t speak any version of Chinese, and could very well be wrong.